Cheapest AI models for Structured Output

“The model perfectly executed the task, repairing the malformed JSON by adding missing quotes and removing trailing commas, while strictly adhering to the constraint of returning only the JSON without any markdown or conversational filler.”

{
  "customer_id": "C-42",
  "plan": "Pro",
  "seats": 12,
  "tags": [
    "priority",
    "renewal"
  ],
  "active": true,
  "notes": "renewal call on Friday"
}

“The model followed the instructions exceptionally well, outputting strict JSON without markdown wrappers and structuring the confidence mapping logically. It correctly nulled the explicitly unconfirmed email, though arguably 'maybe' could also trigger a null value for plan_interest under a strict interpretation of the prompt.”

{
  "company": "Brightline",
  "contact_name": "Jordan",
  "email": null,
  "plan_interest": "Enterprise",
  "budget_usd": 50000,
  "confidence": {
    "company": "high",
    "contact_name": "high",
    "email": "low",
    "plan_interest": "low",
    "budget_usd": "low"
  }
}

“The model response is severely truncated, resulting in invalid JSON and completely missing the required redactions array. It fails the core task.”

```json
{
  "redacted_text": "Contact [NAME] at [EMAIL] or [PHONE]. Ship samples to [STREET_ADDRESS], [